Quantification of multidimensional entanglement stored in a crystal

Abstract

The use of multidimensional entanglement opens new perspectives for quantum information processing. However, an important challenge in practice is to certify and characterize multidimensional entanglement from measurement data that are typically limited. Here, we report the certification and quantification of two-photon multidimensional energy-time entanglement between many temporal modes, after one photon has been stored in a crystal. We develop a method for entanglement quantification which makes use of only sparse data obtained with limited resources. This allows us to efficiently certify an entanglement of formation of 1.18 ebits after performing quantum storage. The theoretical methods we develop can be readily extended to a wide range of experimental platforms, while our experimental results demonstrate the suitability of energy-time multidimensional entanglement for a quantum repeater architecture.

References in corpus (15)

• Device-independent security of quantum cryptography against collective attacks
• Quantum Repeaters with Photon Pair Sources and Multi-Mode Memories
• Quantum Storage of Photonic Entanglement in a Crystal
• Testing the Hilbert space dimension
• Imaging high-dimensional spatial entanglement with a camera
• The structure of multidimensional entanglement in multipartite systems
• Quantifying photonic high-dimensional entanglement
• Characterization of high-dimensional entangled systems via mutually unbiased measurements
• Phase noise measurements in long fiber interferometers for quantum repeaters applications
• Experimental access to higher-dimensional entangled quantum systems using integrated optics
• Generation and distribution of high-dimensional frequency-entangled qudits
• A source of polarization-entangled photon pairs interfacing quantum memories with telecom photons
• Storage of hyperentanglement in a solid-state quantum memory
• Temporal multimode storage of entangled photon pairs
• Compressively characterizing high-dimensional entangled states with complementary, random filtering

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